Gate-valve



(No Model.)

L. S. WHEATON.

GATE VALVE.

No. 526,797. Patented 001 2. 2, 1894.

V F! WITNESSES:

BY g QZZM ATTORNEYS I UNITED STATES PATENT OFFICE.

LINDEN soorr WHEATON, or NEWARK, NEW JEEsEY.

GATE-VALVE.

SPECIFICATION forming part of Letters Patent No. 526,797, dated October 2, 1894.

I Application filedDecember 11, 1893. Serial No. 1 1 (No model) To aZZ whom it may concern.-

Be it known that I, LINDEN SCOTT WHEA- TON, a citizen of the United States, residing in Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Gate-Valves; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Thls invention relates to a new and useful improvement in expansible disk valves, and it consists in the arrangement and combination of parts, hereinafter described and claimed.

The invention is illustrated in the accompanying drawings, wherein- Figure 1 is an end elevation partly sectioned of the improved valve. Fig. 2 is a vertical central section of the same; Fig. 3, a horizontal section taken through the center of the valve proper, certain portions of ,the valve mechanism being removed. Fig. at is an inside View of one of the gate plates of the valve, and Fig. 5 a perspective view of one of the eccentric wedges adapted to expand the valve.

In said drawings a represents the shell of the valve and b and c the inlet and outlet openings therein. These openings b and c are each provided with a ring cl generally of non-corrosible metal, against which the disks of the valve 6 are adapted to press when the valve is closed.

The valve 6 consists of the two disks m and a, each of which is provided on its outer face with a ring fgenerally of non-corrosible metal, which rests against and registers with the ring 01 on the outlet and inlet openings forIning the valve seat. These disks m and n are secured at their upper end to a nut 9 carried by the stem '5 of the valve, and the said nut is adapted to be raised or lowered on the screw h of the said stem i of the valve. The stem '11 has a collar 2'', which has a bearing in the head 9' of the shell in such a manner that the stem may be rotated without being raised or lowered. On the under side of each disk m and 'n are formed two lugs 0, between which is formed a curved recess 10.

Between the disks m andn is placed a yoke or cross-bar g, which is recessed as at s, at

either end, to receive the shanks u of two peculiarly shaped cam pieces, or eccentric wedges t. The shanks a of these cam pieces 25 are arranged back to back parallel with the sides of the disks m and a and the projection 11 of each cam 25 fits into the recess 19 in the disks m and n. The lower end of the yoke or cross-bar q is adapted to rest or bear upon the lugs or projections 7' arranged on either side and at the bottomof the shell a, when the valve is closed down. At the upper end of the disks m and 'n is formed a semi-circular groove or recess y, which fits upon the annular collar y of the nut g. Said collar y bears in its upward pull upon the shoulder z and in its downward thrust upon the shoulder 2;. The whole valve 6 travels upward or downward on the screw shank h of stem 2', and the valve is vertically perforated as at w and ac' to permit the screw h to penetrate the valve, when the same is raised.

In operation the valve 6 is lowered by turning the stem 11 until the yoke q rests on the projections or lugs r and the rings f of the disks m and at rest upon and register with the rings or valve seats d. Upon turning the stem '6 still farther, the cross bar q remains stationary while the disks move, and the shanks u and the back of the eccentric wedges t, carried by said yoke, are pressed against each other, thus throwing the cam projections 11 outward. These cams u press against the disks m and n at the recessed points 19 and throw the said disks forward and clamp them firmly down upon the valve seat.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The herein described valve mechanism, consisting of the two disks provided with inwardly projecting recessed lugs, a yoke placed between said disks, cam pieces having bearing faces in contact with each other carried by said yoke and bearing against said recessed lugs of said disks, all arranged so that, when the disks are lowered to close the valve, the yoke remains stationary and the cam pieces force the disks outward inopposite directions, substantially as described.

2. In a valve, the combination of the shell,

the stem,.the disksca-rnied and adapted to be raised-andloweredin said shell by said stenr,

\ with the yoke placed between said disks, cam

3. The combination in a valve, of the shell 1 (1 provided with the inlet and out-let openings b and c, and with the projections 'r at its lower end, a stem 11 rotating in theauzpper endofi the 1 shell, a, screw'hat thelower endofi saida stem, a nut 9 carried on. said screw, and disks: 'm and nsec-ured tosaid n:ut,,witlr the: yoke q 1 placed between said; disks, the cam, piecest Z carriedby saidyoke andhayin g bearing faces in; contact with each other, said cam pieces being provided with a cam surface 1;, adapted t o bear against the surface of said disks m and n, all arranged so thatlwhen said stem '5 is turned, th e nntgand disksm and n are *loweredin the shell to close the inlet and outlet openings, until the yoke q rests upon the ,projections agwhen the cam pieces are operated to throw the disks m and n outward to bind against the said inlet and outlet openings,,substantially as described.

In testimony that I claim the foregoing I h-avehereunto-set hand this 22d day of November, 1893.

LINDEN; soorr wnEATom Wi-tHQSSQSt ALFRED GARTNER, D. BELL. 

